Java Get Example

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In this section of Java Examples, we are going to illustrate various Java Get examples like how to get the date and time, IP Address or memory size etc.

Java Get Example

In this section of Java Examples, we are going to illustrate various Java Get
examples like how to get the date and time, IP Address or memory size etc.. If
you are a Java beginner this is a best place for you to learn different methods,
functions and class used in Java Language.

Just go through the given examples to get the things fast and practice these
code at your end to learn java easily. After going through this section you will
be able to retrieve different values whether it is a database size or memory
size using Java programming language.

Java Get Examples..

Get host name in Java:This example is going to show you how to
retrieve the host name of a particular IP address. Just go through the example
code to see the use of get method in it.

IP Address: This Java Get IP Address example, explains how to
retrieve the IP Address of the particular machine.

Get Memory Size:With the help of the given Java code you can
easily get the available memory size and can print it on command prompt.

Total Memory Usage:While going through the example, you will learn
how to obtain the used memory from the total memory using Java program.

Use of Get Method in Java:What is method and how to use the get
method in Java, this example is going to illustrate you the same thing. Just
check the example and run it at your end as well to learn it quickly.

Mime Type:It is a technique to describing and attaching
files to internet mail. But in this example you will see how to get the Java
Mime Types.

Get the Month name:If you want to print the name of the month from
the current date, this example is exactly for you.. Go through the code it's
very simple and easy to understand.

Time in Milliseconds:In this code, we have explained how to get
the time in milliseconds. Go through the syntax to understand how it works.

Get Array SizeTo calculate length of the given array we have used length property. It
returns the length of the given array.

Absolute
value JavaAbsolute value is the only value of a number regardless of a prefixed plus or
minus sign. In the example given below we have used abs() method of class
java.lang.Math that returns absolute value of a given number as argument.

Date and
time codeIn the example given below we will see, how to display current date and time
in the user given format. To do all this we have first created instance of the calendar
class that returns object of the same class whose time fields have been
initialized with the current date and time.

Java get
ASCII valueTo print ascii value of a character this is the the simplest way to change
the type a character. Here in the example given below we will select character
from a given string and change their type to integer that will be their ascii
value.

Class DirectoryIn this section of example we are going to describe you
how to fetch the class directory's path by the class name. To get the class
directory's name and its path we have used two methods getClass() and getResource()
over an object instance.

Program to get the color of pixelIn this java example program we have to write code for
getting the pixel color of an image. To get the pixel color we need to first
have an image and then we will be able to get the pixel color of any specific or
particular pixel in the RGB format.

Get column names of a tableIn this example of getting the columns names we need to
have connection with the database and then after we will get metadata of this
table and find the columns name within the metadata.

Java get BlobBlob is known as 'binary large object', is a collection of binary data stored
as a single entity in a database management system and can hold variable amount
of data.

Get Byte Array from FileIn this section, we are going to show the array of bytes from the
specified file. For this, a file 'Hello.txt' is passed into the constructor of
class File.

Calling MethodIn this example we will find the name of the method. Provides programmatic access to the stack trace information printed by
printStackTrace(). It returns array of StackTraceElement objects.

Java get characterIn this example given below, we will learn how to read character from keyboard
and display on standard output device.

Character from StringIn this example we will see that how to convert string
to array of character and retrieve elements from that character array one by
one.

Classes In PackageIn this section, you will learn how to retrieve all the classes from the
package by providing the path of the jar file and the package name.

Get Class NameIn the example given below we will learn how to get name of the particular
class with package name. getName() method returns fully qualified name of the
particular class in string format.

Java Get Class LocationIn this section, you will learn how to get the class location. For this, we
have used the classes URL and ClassLoader.

Show class pathIn this section, you will learn how to get the class path. The method
System.getProperties() determines the current system properties.

Get Time StampIn the example you will learn how to display current time. getTime()
method returns the number of milliseconds represented by Date object that will
be used as argument to create object of
java.sql.Time class.

Java example program to get IP address of own systemAn IP (Internet Protocol) address is a numerical unique
identification number which is assigned to the devices participating in the
network for communication. To get IP address of our own system in a java program
we will be using InetAddress class.

Java example to get Object class name at runtimeIn java there is a way that makes us enabled to get the
object class name at runtime. It can be done by calling the getClass()
method on the class object. Then by calling the method getName() we
can get the name of the object class.

Java example program to get extensionTo get the file name and file extension separately we
can do the string manipulation on the file name. Suppose "filename.ext"
is some filename with extension is provided.

Java example to calculate the execution timeThis example program will describe you the way that how
one can calculate or get the execution time of a method or program in java. This
can be done by subtracting the starting time of the program or method by the
ending time of the method.

Java example to get the execution pathWe can get the execution path of the system in java by
using the system property. For getting execution path we have used "user.dir"
property of the system.

Java example program to get the environment variableThe getenv() method of the java.lang.System
provide us the functionality to get the environment variable value. To get
the single environment variables value we have to call the getenv("environment
variable") method where environment variable is a value that we want to
evaluate.

Java get Next DayIn the given example, we have used the class DateFormatSymbols in
order to get the names of the days of the week. The method getWeekdays()
provide the string of days of week. To get the current day, we have used the
Calendar class.

Java get yesterday's dateIn the given example, we simply get the current date by using the method dateFormat.format(cal.getTime()).But
on subtracting one day from the calendar by using the method cal.add(Calendar.DATE,
-1), the method dateFormat.format(cal.getTime()) will displayed the
yesterday's date.

Java get YearIn this section, you will learn how to obtain the current year. The
Calendar class provides a getInstance() method that returns a Calendar
object.

Java get year from dateIn this section you will study how to retrieve the year from the date. You
can see in the given example that we have called SimpleDateFormat class showing the
format of year.

Java get number of ProcessorsTo display the number of processors available to a current Java Virtual
Machine, we have used the method availableProcessors() of class Runtime and the
method getRuntime() returns the instance of Runtime class with the java
application.

Java get Heap SizeIn this section, we are going to illustrates you how to obtain the heap size.
The heap is the area in the memory used for memory storage during the runtime of
the program.

Screen DimensionsThe Toolkit class has a static method called getDefaultToolkit() and can be
used to obtain the default Toolkit object for the user's system, which contains
information about the user's specific machine.

Number of Days in MonthThis example sets the year as 2008, month as Calendar.FEBRUARY and the date
as 1 using the method calendar.set(year, month, date) provided by the class
Calendar.

Number of rows in
result setIn this section, you will learn how to retrieve the number of rows from the
database table. As you know that the data is stored in the database table in the
form of row and column.

Http
Headers in JavaIn this section, we are going to illustrate you how to get the Http Headers.
Here, we are using the URL class which points the resource. In order to make a
communication link between the application and a URL, we have used the class
URLConnection.

Filename without ExtensionIn this section, you will learn how to obtain the filename without extension.
For this, the file name or the directory name is being provided.

Java get available FontIn order to retrieve all the available fonts, we have used the AWT package.
The class
GraphicsEnvironment describes the collection of all the available
GraphicsDevices and Font objects.

Find Free MemoryIn this section, we are going to obtain the free memory. In order to get the
memory left of being allocated, the method getruntime() returns the runtime
object associated with the Java application.

Folder
Size in JavaIn the given example, we are going to show you the size of specified folder
and also the number of files and folders that are presented in the specified
folder.

XML FileIn this section, you will study how the java application read the XML file.
For this, you need to create a XML file.

Java get windows UsernameIn this section, you will learn how to obtain the window's username. We are
providing you an example which will obtain the window's username by using the System.getProperty().

Java get VersionIn this section, you will learn how to obtain the java version and the OS
version. We are
providing you an example which will obtain the java version installed on the
system and the OS version by using the System.getProperty().

Get User InputIn this section, you will learn how to get the user input from the command
prompt. We are providing you a java application that will communicate with the
user at the command line and returns the user input.

Java get User HomeIn this section, you will study how to get the user home. We are providing
you an example which will obtain the home directory by using the System.getProperty().

System TimeZoneIn this section, you will learn how to obtain the System's TimeZone. The Time
Zone is basically the uniform standard time usually referred to as the local
time.

System PropertiesIn this section, you will learn how to obtain the system properties. The
System class provides a Properties object that describes the configuration of
the current working environment of the system.

System LocaleIn this section, you will learn how to obtain the locale. We are
providing you an example which will obtain the locale of the system by using the
System.getProperty().

Java get Stack Trace as StringIn this section, you will learn how to get the stack trace of an exception as
a String. We are providing you an example, which is throwing an
IllegalArgumentException using Throwable class.

Modify PropertiesIn this section, you will learn how to modify the set of system properties by
adding a new property. In the example given below, we have create a new property
listed in the 'NewProperties.txt' file i.e java.company=Roseindia Pvt Ltd which
is not an actual System Property.

Node ValueIn this section, you will learn how to obtain the node value. Before any
further processing, you need a XML file. For this we have create a employee.xml
file.

Get Node TextIn this section, you will learn how to obtain the text of the node in the
specified XML file. For this we have create a 'employee.xml' file. In the given
example, we have used XMLInputFactory class in order to get the
streams.

Java get Stack TraceWhen you want to generate an exception in a program, it
will be better to print out the exception stack trace to catch the error instead
of using e.getMessage() method.

Progress Bar in JavaProgress Bar is a component used to show the status of the application that
how much time is left in order to complete the task of a specified application.

Radio Button in JavaRadio Button is a circular button on web page that can be selected by the user.
The AWT Widget used to create a radio button is Checkbox. The Checkbox
class is used by the AWT to create both Radio Button and Checkbox.

Menu Bar in JavaA Menu Bar is a set of option that allow the user to choose from any one of
the saving option. A list of other option component a user can
choose in a menu bar.

Java get year from dateIn this section you will study how to retrieve the year from the date. You
can see in the given example that we have called SimpleDateFormat class showing the
format of year.

Popup Box in JavaScriptPopup is used to create and show a component to the user, usually available
on top of the window component in a particular hierarchy. The Popups have a
small life cycle.

Illegal start of typeThe Java error illegal start of type occurred in your code when the starting
braces of catch block is not used after the close of try block.

Unreachable statementIn this Tutorial we want to describe you a code that help you in
understanding a unreachable statement. For this we have a class name' unreachable
error', Inside the main method we have a for loop that has a variable
integer I.;.

Java error streamThe Java error stream is used to print error that arises during the execution
of a program. The execution of program display an output and error to the
different stream that allows the user to move them to different pages thereby
isolating them.

Error java.lang.nullpointerexceptionNullPointerException is the exception that occurred when a programmer
perform an operation on a object or calling a method on the object i.e null. This
exception is thrown by JVM.We should not handle that exception by try and catch block

Error java.lang.noclassdeffounderrorThe Java.lang. noclassdeffounder occurred in a code when the programmer write
a wrong class name on the command prompt during the execution or running of the
program.

Get Length of Array
In this Tutorial we want to describe you a code that help you in understanding
the java error message. For this we have a class name java error message.

Java error logJava error log is a error that arises due to internal error. A error logger
is simple an object that is used to show an error log message for a specifice
system and component used in an application.

Java error incompatible typesJava Error incompatible types occurred when a compiler found a variable and
expression whose data type is not compatible to perform an operation on them.

Java error identifier exceptedJava Error Identifier excepted occurred when the programmer do not specify
the data type of a variable inside the class definition

Java error iconJOptionPane's icon
support specify icon to which the dialog displays. We can use four standard icon
using JOptionPane icons like question, information, warning,
and error).

Java error dialogA Java dialog box is an independent sub window that is used to notice a
temporary message to the user. The dialog box find its extensive application in image, directory
and anything compatible with swing.

Java error codeJava Error code are the set of error that occurs during the compile-time and
Run-time. From java error we have given you a sample of code that makes
you to understand the java error code in a better way.

Display a dialog box with Java ErrorIn this Tutorial we want to describe you a code that help you in
implementation of dialog box with Java Error. For this we have a class name
could_not_find_mainclass.Inside the main method we print the
"couldnotfoundthemainclass"using System.out.println.

Java get default CharsetWe can achieve the defaultcharset
through the java program. In our example java program we have created an object
of FileWriter and then we will be using getEncoding() method for
getting the defaultcharset of this file writer.

Java error reading from fileJava error reading file are the common error occurred in java that when
the user encounter a corrupt file and show a message to the user reason for the
failure.

Java error missing return statementJava error missing return statement are those error in Java that occurred
when a programmer forget to write a return statement inside the conditional clauses. method
with a non-void return provides you an object of the specific type.

Get Current ThreadA Thread is the independent path of execution in a program. Many thread runs
concurrently with a program. Some threads are Multithread, This thread refers to
two or more thread running simultaneously within a program.

Java error classJava error class is subclass of throw able class. This mean the
application does not able to catch the error occurred in the try block. These
error occurred due to abnormal condition.

Java error cannot readThe Java error cannot read occurred when a programmer do not follow the
following condition.

Get Thread NameThread is the independent path of execution of a thread in a program. The JVM
provides an application to execute the multiple thread running
concurrently in an application.

Get Length of ArrayArray is defined as data of similar data type. It is defined as data storage
method to store information. A array is considered as a group of
object with the common attribute.

Java Get Last Line of File
In This Tutorial we want to describe you a code that helps you in understanding
Get Last Line of File in Java . For this we have a class name "Get Last Line
of File".

Get Java VersionThe Java has a lot changes since JDK1.0 as well as
numerous additions of classes and packages. In addition to this class and
package ,Java introduced class standard libraries.

Get File SizeIn this Tutorial, we want to describe you a code that helps you in
understanding Get File Size.

Show random numberRandom Number is the set of unordered arranged number. The class Random
is derived from java.util.Random.An instance of Random class is used to
provide you a stream of pseudorandom number.

Fetch
Property by NameIn this Tutorial we want to describe you a code that helps you in
understanding to get Property by Name. For this we have a class name "Get
Property By Name".

Show
current directoryIn this Tutorial we want to describe you a code that helps you in
understanding Get Current Directory. For this we have a class name CurrentDir,
Inside the main method we create an instance file1 and file2 of file
class by using new operator.

Current
time in JavaFormat is an abstract class that is used for formatting local-sensitive
information like date, number and message. The Format class derived from
the package java.text.format.

Java get
time zoneTime Zone class inherits from a Java.util.time zone. This class represents a
time zone offset. The Time zone gives you a specific time zone of a specific
locale where the program is running.

Java get
time and dateThe Class Date provides you a specific instant in
time( millisecond) precision. This class enabled you to interprets
allowed dates as year, month, day, hour, minute, and second values and
date formatting and parsing of date string.

System IP
addressThe System IP address is a unique numerical identification
assigned to a different system involved in the network for communication. The
Format for a IP address is a 32- bit numeric address written as four number separated
by periods i.e 192.168.1.1 is an example of IP address.

Tomorrow
dateIn this Tutorial we want to describe you a code that help you in
understanding Get Tomorrow Date. For this we have a class name
GetTomorrowDate.Inside the main method we have a variable name string s,Date date, Format
formatter.

Last day of the monthCalendar class inherits from Java.util.calendar.Calendar
is base abstract class, that is used for converting between a Date
object and a set of integer fields such as YEAR, MONTH,
DAY, HOUR.. A Date object specific
instant in time with millisecond.

Get Month NameIn this Example we want to describe you a code that help you in understanding
a how to get a 'Get Month Name Example'.For this we have a class name 'GetMonthNameExample'.

Input From ConsoleThe Console Class inherits from Java.io.console and implements flushable interface. The
Input from Console is used to access the character -based console device
associated with the current Java virtual machine.

Get local host nameIn this Example we want to describe you a code that helps you in
understanding a code how to 'Get Local Host Name'. For this we have a class name
GetLocalHostName.

Java binary to decimalIn this Tutorial we want to describe you a code that help you in
understanding a how to get a 'Java binary to decimal'.

Get int from stringIn this section, you will study how to obtain the integer value from String.
For this, we have defined a string. The method Integer.parseInt(st)
converts the string into the integer.

Absolute Path
information is requiredIn this section, you will study how to obtain the absolute path of a
particular file. For this, we have define a file 'MainClass.java'. The method
file.getAbsolutePath() returns the absolute path of the given file.

Elapsed Time in javaIn this section, you will study how to obtain the elapsed time. As you all
know that the Elapsed time is the time taken to complete the process. In the
given example, we have used the method System.nanoTime() to get the start
time and the end time of the defined process.

Get File TypeThis section illustrates you how to get the file type. In the given example,
we have create an instance of the class File and passed the file 'Hello.txt' to
the constructor of this class.

File TimestampThe following example shows the modification date and time of the specified file.
The class Runtime provides the runtime environment. The class BufferedReader
reads the file from the console and the method runtime.exec("cmd/c
dir" +fname) executes the process.

Array
map in JavaScriptIn this Tutorial we want to describe you a code that help you in
understanding JavaScript array map. For this we are using a JavaScript language as
script language.

Clone in java exampleJava clone method is used to present the duplication of object in the Java
programming language. The Java objects are manipulated through
reference variables, we don't have any way to copy an object in java.

Java binary tree insertThe Binary Tree insert is specialized use of binary tree. The concept lies
behind is that all the element value less than the root node value insert left
to the root node and the element value greater than the root node insert right
to this root node.

Binary tree
codingBinary Tree are the specialized tree that has two possible branches i.e left
and right branch. These tree are useful when you build a parse of tree
especially in mathematics and Boolean.

Use of Local Inner classThe Java language enables you to define a class inside another class. Such a
class is defined as Nested Class or Local Inner class.